Clamp.



I PATBNTED DEC. 19, 1905. GI HI CLAMP.

APPLICATION FILED APRA, 1905,

- I Y! W, attan-13f NrrED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed April 4., 1905. Serial No. 258,827.

To all whom it may concern.-

Be it known that I, CARL H. LANG, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Clamps, of which thefollowing is a specification.

This invention consists of a novel form of clamp which has been devisedparticularly for use in construction and repair of piano-keys in gluingthe ivory fronts, top, and tail pieces to the body of the key, which isordinarily of wood. The clamp is designed to facilitate the repair ofkeys, action parts, split hammers, or the like and may be used invarious ways in the manufacture of piano parts especially.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means forefi'ecting the result reference is to be had to the followingdescription and accompanying drawings, in which- Figure 1 is aperspective view showing the invention as when applied in actual use inconnection with a key of a piano. Fig. 2 is a perspective view showing adifferent application of the invention and adjustment of the partsthereof. Fig. 3 is a side elevation of the clamp, illustrating a furtherapplication thereof. Fig. 4 is a detail perspective view of theclamp-plate utilized and forming a part of the clamp device. Fig. 5 is aperspective view of the relatively movable section of the clamp.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The clamp comprises a frame composed of sections which for the purposeof this invention will be called the relatively fixed section 1 and therelatively movable section 2. The sections of the frame of the clamp areof approximately U form, each having spaced sides and a connecting-bartherefor. The sides of the movable section 2 have pivotal connection atthe ends with extremities of the sides of'the section 1, the pivotalconnection being indicated at 3. It will therefore be seen that thesection 2 by pivotal movement may be adjusted so as to be arranged inline with the section 1 or at an angle thereto, according to the desiresof the operator and dependent upon the special use to which the clampwill be put. The section 1 is provided with the customary clamp-screw 4,which is adapted to engage a side of the clamp-plate 5, the latter beingof somewhat rectangular form. The side of the plate engaged by the screw4 is formed with diagonal ribs 6, which extend from corner to corner,preferably, said ribs being connected near one of the ends of the plate5 by a transverse arcshaped rib 7, the latter in conjunction with theadjacent portions of the ribs 6 forming a seat 8 to receive the end ofthe screw, so that the latter may effectively prevent displacement ofthe plate when the parts of the clamp are arranged in certain positions.

Projecting from the transverse bar of the section 2 of the clamp anddisposed between the sides thereof is a projection or extension 9, thelatter being adapted to be received in the guide-pin hole or openingcustomarily formed in the bottom of the piano-key, and said member 9will effectively prevent the clamp from slipping out of place whenpressure is being applied in an oblique direction or at an angle to thesection 2 aforesaid. An end of the clamp-plate 6 has a transverse tongueor rib 10 extending therefrom in a direction upon the side opposite thathaving the ribs 6' and 7, and this element 10 also assists in preventingslipping of the clamp-plate when the clamp is holding parts together ina mannersimilar to that shown in Fig. 1 of the drawings.

Fig. 1 shows the clamp as when utilized in the operation of gluing ivoryparts to a pianokey, and the practical advantages of the clamp will benoted with regard to the adjustment of the parts in the applicationillustrated in this figure.

In Figs. 1 and 2 the extension or projection 9 is disposed in theguidepin opening of the key-body, and the sections 1 and 2 of the frameof the clamp are arranged at an angle to each other.

In Fig. 2 the section 1 is approximately at a right angle to the section2, and theclampscrew 4 is engaged in the seat 8 upon the outer side ofthe clamp-plate 5.

Fig. 3 shows the frame-sections l and 2 approximately in line with eachother, in which instance the clamp may be used as an ordinary clampdevice for holding parts together, as will be very obvious. verse bar ofthe section 2 may be widened, so as to afford an extended bearing forthe same in the clamping operation.

A special advantageous feature of the invention resides in the fact thatin gluing on the If desired, the trans top or head piece of a piano-keysaid clamp will draw the ivory joints with the tailpiece tightlytogether, so that no black lines will be apparent when the ivory partsof the key have been secured and the key finished.

Having thus described the invention, what is claimed as new is- 1. In aclamp, the combination of a frame composed of approximately U-shapedsections, having the sides thereof pivotally connected, and a clampmember carried by one of said sections.

2. In a clamp, the combination of a frame composed of a sectioncomprising spaced sides, a second section comprising spaced sides havingpivotal connection with the sides of the first-mentioned section, and aclamp-screw carried by the last-mentioned section, the sides of thefirst-mentioned section being less distance apart than those of thesecond-mentioned section, whereby those of the first-mentioned sectionmay be turned so as to occupy space between the sides of thesecond-mentioned section.

3. In a clamp, the combination of a frame composed ofangularly-adjustable sections of approximately U form, the sides of saidsections being connected, and a clamp-screw carried by one of thesections.

4. In a clamp, the combination of a frame, a clamp-screw carried by theframe, a clampplate provided upon a side thereof with angularly-arrangedribs, and a transverse rib connecting spaced portions of theangularlyarranged ribs aforesaid.

5. In a clamp, the combination of a frame, a clamp-screw carried by theframe, a clampplate, diagonally-arranged ribs upon one side of theclamp-plate, a transverse arc-shaped rib connecting spaced portions ofthe diagonallyextending ribs and forming a seat for the clamp-screw, anda transverse rib or tongue upon the side of the plate opposite thathaving the ribs aforesaid.

6. In a clamp, the combination of a frame composed of sections ofapproximately U form, the sides of the sections having pivotalconnection, a clamp-screw carried by one of the sections, and anextension or projection projected from the transverse bar of the othersection between the sides thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

CARL H. LANG. [L. s.l

Witnesses:

GEORGINA BAXTER, MARK A. FooTE.

